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Add Stack Plugin #1816
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Add Stack Plugin #1816
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| import struct | ||
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| from typing import List | ||
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| from volatility3.framework.symbols.windows import extensions | ||
| from volatility3.framework.configuration import requirements | ||
| from volatility3.framework import interfaces, renderers, constants | ||
| from volatility3.framework.renderers import format_hints | ||
| from volatility3.plugins.windows import pslist | ||
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| class Stack(interfaces.plugins.PluginInterface): | ||
| """Lists the Stack boundaries and dump Stack""" | ||
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| _required_framework_version = (2, 0, 0) | ||
| _version = (3, 0, 1) | ||
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| @classmethod | ||
| def get_requirements(cls): | ||
| return [ | ||
| requirements.ModuleRequirement( | ||
| name="kernel", | ||
| description="Windows Kernel", | ||
| architectures=["Intel32", "Intel64"], | ||
| ), | ||
| requirements.VersionRequirement( | ||
| name="pslist", component=pslist.PsList, version=(3, 0, 0) | ||
| ), | ||
| requirements.ListRequirement( | ||
| name="pid", | ||
| element_type=int, | ||
| description="Process IDs to operate on", | ||
| optional=False, | ||
| ), | ||
| requirements.BooleanRequirement( | ||
| name="dump", | ||
| description="Whether to dump the stack", | ||
| default=False, | ||
| optional=True, | ||
| ), | ||
| ] | ||
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| def _generator(self): | ||
| file_output = "Disabled" | ||
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| kernel = self.context.modules[self.config["kernel"]] | ||
| filter_func = pslist.PsList.create_pid_filter(self.config.get("pid"), None) | ||
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| procs: List[extensions.EPROCESS] = pslist.PsList.list_processes( | ||
| context=self.context, | ||
| kernel_module_name=self.config["kernel"], | ||
| filter_func=filter_func, | ||
| ) | ||
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| for proc in procs: | ||
| proc_layer_name = proc.add_process_layer() | ||
| proc_layer = self.context.layers[proc_layer_name] | ||
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| thread_list: List[extensions.ETHREAD] = list( | ||
| proc.ThreadListHead.to_list( | ||
| f"{kernel.symbol_table_name}{constants.BANG}_ETHREAD", | ||
| "ThreadListEntry", | ||
| ) | ||
| ) | ||
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| # no need to parse the time | ||
| active_thread_list: List[extensions.ETHREAD] = [ | ||
| t for t in thread_list if t.ExitTime.QuadPart < 0 | ||
| ] | ||
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| for thread in active_thread_list: | ||
| trap_frame = thread.Tcb.TrapFrame.dereference() | ||
| thread_rsp = trap_frame.Rsp | ||
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| # first entry of TEB is NT_TIB | ||
| # Stack Base is at NT_TIB + 8 | ||
| # https://github.com/wine-mirror/wine/blob/master/include/winternl.h#L494 | ||
| # https://github.com/wine-mirror/wine/blob/master/include/winnt.h#L2445 | ||
| stack_base = struct.unpack( | ||
| "Q", proc_layer.read(offset=thread.Tcb.Teb + 8, length=8) | ||
| )[0] | ||
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| stack_size = stack_base - thread_rsp | ||
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| if self.config["dump"]: | ||
| fname = f"{proc.UniqueProcessId}.{thread.Cid.UniqueThread}.dmp" | ||
| stack = proc_layer.read(offset=thread_rsp, length=stack_size) | ||
|
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. This is a reasonable use of read, because it's a big chunk of unstructured (or unknown structure) data, that you just want to write out as a big blob and aren't going to use again inside volatility. |
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| with self.open(fname) as f: | ||
| f.write(stack) | ||
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| file_output = fname | ||
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| yield ( | ||
| 0, | ||
| ( | ||
| proc.UniqueProcessId, | ||
| thread.Cid.UniqueThread, | ||
| format_hints.Hex(thread.vol.offset), | ||
| format_hints.Hex(thread_rsp), | ||
| format_hints.Hex(stack_base), | ||
| format_hints.Hex(stack_size), | ||
| file_output, | ||
| ), | ||
| ) | ||
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| def run(self): | ||
| return renderers.TreeGrid( | ||
| [ | ||
| ("PID", int), | ||
| ("TID", int), | ||
| ("Thread", format_hints.Hex), | ||
| ("RSP", format_hints.Hex), | ||
| ("Stack Base", format_hints.Hex), | ||
| ("Stack Size", format_hints.Hex), | ||
| ("File Output", str), | ||
| ], | ||
| self._generator(), | ||
| ) | ||
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Please try to avoid reading bytes directly. Either make a struct or at least instantiate a new object of the right type for windows on it. Having to 0 index the results of unpack basically throws away all the extra goodness we provide through the volatility model (keeping track of the type, the offset, which layer it came from, etc).
The entire volatility framework is a giant parser, so if you're resorting to struct.unpack yourself please consider if there's no other way of doing it (or if you're doing it so often efficiency comes into question, which ones per thread, isn't the case here).